Crack bridging processes in toughened ceramics
The fracture toughness of ceramics can be improved by the incorporation of a variety brittle discontinuous reinforcing phases. Observations of crack paths in these systems indicate that these reinforcing phases bridge the crack in the region behind crack tip. Recent developments in toughening models based on crack bridging processes in such systems are discussed and compared to the experimentally observed toughening responses with second phase whisker and self (matrix grain) reinforcement. The bridging model then can be used to optimize the toughening effects based modification of pertinent material characteristics (e.g., microstructure and physical properties). 25 refs., 5 figs., 1 tab.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6948624
- Report Number(s):
- CONF-9007107-1; ON: DE90011650
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CARBIDES
CARBON COMPOUNDS
CERAMICS
CRACKS
CRYSTAL STRUCTURE
CRYSTALS
FRACTURE PROPERTIES
GRAIN SIZE
MECHANICAL PROPERTIES
MICROSTRUCTURE
MONOCRYSTALS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
SIZE
WHISKERS